Can n79 bought in China be used in Canada?

Yes, just change the card, but it's inconvenient. Because it is made in China, it is mainly aimed at the domestic customer base, so even if you switch to the English interface, it is troublesome to switch to sending short messages in Chinese by default from time to time.

I suggest you buy another mobile phone in Canada. Canada's telecommunications industry is developed, with 3G and faster speed.